Add QuickLinks based on 'frecency' pattern

src/lib/quick-links.svelte.ts

@@ -0,0 +1,60 @@
+export interface QuickLink {
+	id: string;
+	score: number;
+	lastAccessed: number;
+}
+
+const RETURNED_LENGTH: number = 9;
+const MAX_SCORE: number = 50;
+const MAX_ENTRIES: number = RETURNED_LENGTH * 4;
+
+class QuickLinksService {
+	#links = $state<QuickLink[]>([]);
+
+	constructor() {
+		if (typeof window !== 'undefined') {
+			const saved = localStorage.getItem('ql');
+			if (saved) {
+				this.#links = JSON.parse(saved);
+			}
+		}
+	}
+
+	get list(): QuickLink[] {
+		return this.#links.slice(0, RETURNED_LENGTH);
+	}
+
+	recordVisit(id: string) {
+		if (id == '') return;
+		const existing = this.#links.find((l) => l.id === id);
+
+		if (existing) {
+			existing.score += 1;
+			existing.lastAccessed = Date.now();
+		} else {
+			this.#links.push({
+				id: id,
+				score: 1,
+				lastAccessed: Date.now()
+			});
+		}
+
+		// Score decay - if MAX_SCORE reached, divide all by two
+		if (this.#links.some((l) => l.score > MAX_SCORE)) {
+			this.#links.forEach((l) => {
+				l.score = Math.max(1, Math.floor(l.score / 2));
+			});
+		}
+
+		// Sort & Prune
+		const sorted = [...this.#links].sort(
+			(a, b) => b.score - a.score || b.lastAccessed - a.lastAccessed
+		);
+
+		this.#links = sorted.slice(0, MAX_ENTRIES);
+
+		localStorage.setItem('ql', JSON.stringify(this.#links));
+	}
+}
+
+export const quickLinks = new QuickLinksService();